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Discussion Starter #1
I had to put another head gasket on my '86 (Cal. engine) 22R. I runs well except the engine idles rough. No vac leaks, everything is right on otherwise. The WARM compression test is as follows:
#1=150 PSI
#2=125PSI
#3=125PSI
#4=155PSI
Engine is stock, 1 1/2 years on rebuild, head was rebuilt (reground valves, bronze guides, rewelded galvanically corroded passages & resurfaced).
I did the rebuild work myself. ALL new parts. Block was resurfaced and head was re-torqued after a few hundred miles and it still leaked coolant from the front-left corner. It used coolant regularly and then really subdied after the caltrates and rust plugged the way out. It ran smooth as a sewing machine until lately. It just idles rough and I can hear a "rythmic" miss in the tailpipe. Uses NO oil between changes. All ignition-related items have been replaced new. When cranking the starter, the engine does sound a little "unbalanced" (not consistantly against the engine compression) but not too bad. I just have a trained ear when it comes to engine noises. There is no exhaust smell in the radiator and the tailpipe is dry.
I know the specs call for 171PSI.
Do the above readings seem too out of spec?
I think my dilemma is attributable to the head. Anyone else concurr?
Thanx
 

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Trailer Trash Engineer
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592 Posts
You can squirt some oil in the plug holes and check again to see if it's rings or not. If not, then it's either gasket or valves. A leak down tester will tell you more if you have access to one. Basically you're pressurizing the cylinder with compressed air and listening at the intake, exhaust, and crankcase for leakage, as well as looking in the radiator for bubbles. Or in your case, it could be leaking inbetween 2 and 3. That's the best way to narrow down the problem, I think. I wouldn't worry too much about it if they were all pretty even, but they're not, so there might be a problem. Good luck.
 

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Trailer Trash Engineer
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592 Posts
:lol:
 
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